Frequencies for first 10,000 rows of physn_ext_srvc_onst_nrsdnt_sw variable in 

  Services: |
  Physician |
   Extender |
    On-Site |
    Nonresi |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,575       75.75       75.75
          N |      2,405       24.05       99.80
          Y |         20        0.20      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 9 Jan 2018